diff --git a/libraries/WiFi/src/WiFi.h b/libraries/WiFi/src/WiFi.h
index d56d2b7e..53c5b2e9 100644
--- a/libraries/WiFi/src/WiFi.h
+++ b/libraries/WiFi/src/WiFi.h
@@ -34,6 +34,8 @@
 #include "WiFiGeneric.h"
 
 #include "WiFiClient.h"
+#include "WiFiServer.h"
+#include "WiFiUdp.h"
 
 class WiFiClass : public WiFiGenericClass, public WiFiSTAClass, public WiFiScanClass, public WiFiAPClass
 {
@@ -55,6 +57,8 @@ public:
 public:
     void printDiag(Print& dest);
     friend class WiFiClient;
+    friend class WiFiServer;
+    friend class WiFiUDP;
 };
 
 extern WiFiClass WiFi;
diff --git a/libraries/WiFi/src/WiFiGeneric.cpp b/libraries/WiFi/src/WiFiGeneric.cpp
index a8a1a07f..a0236a20 100644
--- a/libraries/WiFi/src/WiFiGeneric.cpp
+++ b/libraries/WiFi/src/WiFiGeneric.cpp
@@ -304,7 +304,21 @@ bool WiFiGenericClass::enableAP(bool enable)
 // ------------------------------------------------ Generic Network function ---------------------------------------------
 // -----------------------------------------------------------------------------------------------------------------------
 
-void wifi_dns_found_callback(const char *name, const ip_addr_t *ipaddr, void *callback_arg);
+static bool _dns_busy = false;
+
+/**
+ * DNS callback
+ * @param name
+ * @param ipaddr
+ * @param callback_arg
+ */
+static void wifi_dns_found_callback(const char *name, const ip_addr_t *ipaddr, void *callback_arg)
+{
+    if(ipaddr) {
+        (*reinterpret_cast<IPAddress*>(callback_arg)) = ipaddr->u_addr.ip4.addr;
+    }
+    _dns_busy = false;
+}
 
 /**
  * Resolve the given hostname to an IP address.
@@ -313,36 +327,24 @@ void wifi_dns_found_callback(const char *name, const ip_addr_t *ipaddr, void *ca
  * @return 1 if aIPAddrString was successfully converted to an IP address,
  *          else error code
  */
-static bool _dns_busy = false;
-
 int WiFiGenericClass::hostByName(const char* aHostname, IPAddress& aResult)
 {
     ip_addr_t addr;
     aResult = static_cast<uint32_t>(0);
+
+    _dns_busy = true;
     err_t err = dns_gethostbyname(aHostname, &addr, &wifi_dns_found_callback, &aResult);
-    _dns_busy = err == ERR_INPROGRESS;
-    while(_dns_busy);
-    if(err == ERR_INPROGRESS && aResult) {
-        //found by search
-    } else if(err == ERR_OK && addr.u_addr.ip4.addr) {
+    if(err == ERR_OK && addr.u_addr.ip4.addr) {
         aResult = addr.u_addr.ip4.addr;
+        _dns_busy = false;
+    } else if(err == ERR_INPROGRESS) {
+        while(_dns_busy){
+            delay(1);
+        }
     } else {
+        _dns_busy = false;
         return 0;
     }
     return 1;
 }
 
-/**
- * DNS callback
- * @param name
- * @param ipaddr
- * @param callback_arg
- */
-void wifi_dns_found_callback(const char *name, const ip_addr_t *ipaddr, void *callback_arg)
-{
-    if(ipaddr) {
-        (*reinterpret_cast<IPAddress*>(callback_arg)) = ipaddr->u_addr.ip4.addr;
-    }
-    _dns_busy = false;
-}
-
diff --git a/libraries/WiFi/src/WiFiServer.cpp b/libraries/WiFi/src/WiFiServer.cpp
new file mode 100644
index 00000000..a10e3b16
--- /dev/null
+++ b/libraries/WiFi/src/WiFiServer.cpp
@@ -0,0 +1,77 @@
+/*
+  Server.cpp - Server class for Raspberry Pi
+  Copyright (c) 2016 Hristo Gochkov  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "WiFiServer.h"
+#include <lwip/sockets.h>
+#include <lwip/netdb.h>
+
+#undef write
+
+int WiFiServer::setTimeout(uint32_t seconds){
+  struct timeval tv;
+  tv.tv_sec = seconds;
+  tv.tv_usec = 0;
+  if(setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof(struct timeval)) < 0)
+    return -1;
+  return setsockopt(sockfd, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, sizeof(struct timeval));
+}
+
+size_t WiFiServer::write(const uint8_t *data, size_t len){
+  return 0;
+}
+
+void WiFiServer::stopAll(){}
+
+WiFiClient WiFiServer::available(){
+  if(!_listening)
+    return WiFiClient();
+  struct sockaddr_in _client;
+  int cs = sizeof(struct sockaddr_in);
+  int client_sock = accept(sockfd, (struct sockaddr *)&_client, (socklen_t*)&cs);
+  if(client_sock >= 0){
+    int val = 1;
+    if(setsockopt(client_sock, SOL_SOCKET, SO_KEEPALIVE, (char*)&val, sizeof(int)) == ESP_OK)
+      return WiFiClient(client_sock);
+  }
+  return WiFiClient();
+}
+
+void WiFiServer::begin(){
+  if(_listening)
+    return;
+  struct sockaddr_in server;
+  sockfd = socket(AF_INET , SOCK_STREAM, 0);
+  if (sockfd < 0)
+    return;
+  server.sin_family = AF_INET;
+  server.sin_addr.s_addr = INADDR_ANY;
+  server.sin_port = htons(_port);
+  if(bind(sockfd, (struct sockaddr *)&server, sizeof(server)) < 0)
+    return;
+  if(listen(sockfd , _max_clients) < 0)
+    return;
+  fcntl(sockfd, F_SETFL, O_NONBLOCK);
+  _listening = true;
+}
+
+void WiFiServer::end(){
+  close(sockfd);
+  sockfd = -1;
+  _listening = false;
+}
+
diff --git a/libraries/WiFi/src/WiFiServer.h b/libraries/WiFi/src/WiFiServer.h
new file mode 100644
index 00000000..b2d9996f
--- /dev/null
+++ b/libraries/WiFi/src/WiFiServer.h
@@ -0,0 +1,53 @@
+/*
+  Server.h - Server class for Raspberry Pi
+  Copyright (c) 2016 Hristo Gochkov  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef _WIFISERVER_H_
+#define _WIFISERVER_H_
+
+#include "Arduino.h"
+#include "Server.h"
+#include "WiFiClient.h"
+
+class WiFiServer : public Server {
+  private:
+    int sockfd;
+    uint16_t _port;
+    uint8_t _max_clients;
+    bool _listening;
+
+  public:
+    void listenOnLocalhost(){}
+
+    WiFiServer(uint16_t port=80, uint8_t max_clients=4):sockfd(-1),_port(port),_max_clients(max_clients),_listening(false){}
+    ~WiFiServer(){ end();}
+    WiFiClient available();
+    WiFiClient accept(){return available();}
+    void begin();
+    size_t write(const uint8_t *data, size_t len);
+    size_t write(uint8_t data){
+      return write(&data, 1);
+    }
+    using Print::write;
+
+    void end();
+    operator bool(){return _listening;}
+    int setTimeout(uint32_t seconds);
+    void stopAll();
+};
+
+#endif /* _WIFISERVER_H_ */
diff --git a/libraries/WiFi/src/WiFiUdp.cpp b/libraries/WiFi/src/WiFiUdp.cpp
new file mode 100644
index 00000000..1b53cb32
--- /dev/null
+++ b/libraries/WiFi/src/WiFiUdp.cpp
@@ -0,0 +1,254 @@
+/*
+  Udp.cpp - UDP class for Raspberry Pi
+  Copyright (c) 2016 Hristo Gochkov  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "WiFiUdp.h"
+#include <lwip/sockets.h>
+#include <lwip/netdb.h>
+#include <errno.h>
+
+#undef write
+#undef read
+
+WiFiUDP::WiFiUDP()
+: udp_server(-1)
+, server_port(0)
+, remote_port(0)
+, tx_buffer(0)
+, tx_buffer_len(0)
+, rx_buffer(0)
+{}
+
+WiFiUDP::~WiFiUDP(){
+   stop();
+}
+
+uint8_t WiFiUDP::begin(IPAddress address, uint16_t port){
+  stop();
+
+  server_port = port;
+
+  tx_buffer = new char[1460];
+  if(!tx_buffer){
+    log_e("could not create tx buffer: %d", errno);
+    return 0;
+  }
+
+  if ((udp_server=socket(AF_INET, SOCK_DGRAM, 0)) == -1){
+    log_e("could not create socket: %d", errno);
+    return 0;
+  }
+
+  int yes = 1;
+  if (setsockopt(udp_server,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(yes)) < 0) {
+      log_e("could not set socket option: %d", errno);
+      stop();
+      return 0;
+  }
+
+  struct sockaddr_in addr;
+  memset((char *) &addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(server_port);
+  addr.sin_addr.s_addr = (in_addr_t)address;
+  if(bind(udp_server , (struct sockaddr*)&addr, sizeof(addr)) == -1){
+    log_e("could not bind socket: %d", errno);
+    stop();
+    return 0;
+  }
+  fcntl(udp_server, F_SETFL, O_NONBLOCK);
+  return 1;
+}
+
+uint8_t WiFiUDP::begin(uint16_t p){
+  return begin(IPAddress(INADDR_ANY), p);
+}
+
+uint8_t WiFiUDP::beginMulticast(IPAddress a, uint16_t p){
+  if(begin(IPAddress(INADDR_ANY), p)){
+    if(a != 0){
+      struct ip_mreq mreq;
+      mreq.imr_multiaddr.s_addr = (in_addr_t)a;
+      mreq.imr_interface.s_addr = INADDR_ANY;
+      if (setsockopt(udp_server, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
+          log_e("could not join igmp: %d", errno);
+          stop();
+          return 0;
+      }
+      multicast_ip = a;
+    }
+    return 1;
+  }
+  return 0;
+}
+
+void WiFiUDP::stop(){
+  if(tx_buffer){
+    delete[] tx_buffer;
+  }
+  tx_buffer_len = 0;
+  if(rx_buffer){
+    cbuf *b = rx_buffer;
+    rx_buffer = NULL;
+    delete b;
+  }
+  if(udp_server == -1)
+    return;
+  if(multicast_ip != 0){
+    struct ip_mreq mreq;
+    mreq.imr_multiaddr.s_addr = (in_addr_t)multicast_ip;
+    mreq.imr_interface.s_addr = (in_addr_t)0;
+    setsockopt(udp_server, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq));
+    multicast_ip = IPAddress(INADDR_ANY);
+  }
+  close(udp_server);
+  udp_server = -1;
+}
+
+int WiFiUDP::beginMulticastPacket(){
+  if(!server_port || multicast_ip == IPAddress(INADDR_ANY))
+    return 0;
+  remote_ip = server_port;
+  remote_port = multicast_ip;
+  return beginPacket();
+}
+
+int WiFiUDP::beginPacket(){
+  if(!remote_port)
+    return 0;
+  tx_buffer_len = 0;
+  return 1;
+}
+
+int WiFiUDP::beginPacket(IPAddress ip, uint16_t port){
+  remote_ip = ip;
+  remote_port = port;
+  return beginPacket();
+}
+
+int WiFiUDP::beginPacket(const char *host, uint16_t port){
+  struct hostent *server;
+  server = gethostbyname(host);
+  if (server == NULL){
+    log_e("could not get host from dns: %d", errno);
+    return 0;
+  }
+  return beginPacket(IPAddress((const uint8_t *)(server->h_addr_list[0])), port);
+}
+
+int WiFiUDP::endPacket(){
+  struct sockaddr_in recipient;
+  recipient.sin_addr.s_addr = (uint32_t)remote_ip;
+  recipient.sin_family = AF_INET;
+  recipient.sin_port = htons(remote_port);
+  int sent = sendto(udp_server, tx_buffer, tx_buffer_len, 0, (struct sockaddr*) &recipient, sizeof(recipient));
+  if(sent < 0){
+    log_e("could not send data: %d", errno);
+  }
+  return sent;
+}
+
+size_t WiFiUDP::write(uint8_t data){
+  if(tx_buffer_len == 1460){
+    endPacket();
+    tx_buffer_len = 0;
+  }
+  tx_buffer[tx_buffer_len++] = data;
+  return 1;
+}
+
+size_t WiFiUDP::write(const uint8_t *buffer, size_t size){
+  size_t i;
+  for(i=0;i<size;i++)
+    write(buffer[i]);
+  return i;
+}
+
+int WiFiUDP::parsePacket(){
+  if(rx_buffer)
+    return 0;
+  struct sockaddr_in si_other;
+  int slen = sizeof(si_other) , len;
+  char * buf = new char[1460];
+  if(!buf){
+    return 0;
+  }
+  if ((len = recvfrom(udp_server, buf, 1460, MSG_DONTWAIT, (struct sockaddr *) &si_other, (socklen_t *)&slen)) == -1){
+    delete[] buf;
+    if(errno == EWOULDBLOCK){
+      return 0;
+    }
+    log_e("could not receive data: %d", errno);
+    return 0;
+  }
+  remote_ip = IPAddress(si_other.sin_addr.s_addr);
+  remote_port = ntohs(si_other.sin_port);
+  rx_buffer = new cbuf(len);
+  rx_buffer->write(buf, len);
+  delete[] buf;
+  return len;
+}
+
+int WiFiUDP::available(){
+  if(!rx_buffer) return 0;
+  return rx_buffer->size();
+}
+
+int WiFiUDP::read(){
+  if(!rx_buffer) return -1;
+  int out = rx_buffer->read();
+  if(!rx_buffer->size()){
+    cbuf *b = rx_buffer;
+    rx_buffer = 0;
+    delete b;
+  }
+  return out;
+}
+
+int WiFiUDP::read(unsigned char* buffer, size_t len){
+  return read((char *)buffer, len);
+}
+
+int WiFiUDP::read(char* buffer, size_t len){
+  if(!rx_buffer) return 0;
+  int out = rx_buffer->read(buffer, len);
+  if(!rx_buffer->size()){
+    cbuf *b = rx_buffer;
+    rx_buffer = 0;
+    delete b;
+  }
+  return out;
+}
+
+int WiFiUDP::peek(){
+  if(!rx_buffer) return -1;
+  return rx_buffer->peek();
+}
+
+void WiFiUDP::flush(){
+  cbuf *b = rx_buffer;
+  rx_buffer = 0;
+  delete b;
+}
+
+IPAddress WiFiUDP::remoteIP(){
+  return remote_ip;
+}
+
+uint16_t WiFiUDP::remotePort(){
+  return remote_port;
+}
diff --git a/libraries/WiFi/src/WiFiUdp.h b/libraries/WiFi/src/WiFiUdp.h
new file mode 100644
index 00000000..b543d5f9
--- /dev/null
+++ b/libraries/WiFi/src/WiFiUdp.h
@@ -0,0 +1,77 @@
+/*
+ *  Udp.cpp: Library to send/receive UDP packets.
+ *
+ * NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
+ * 1) UDP does not guarantee the order in which assembled UDP packets are received. This
+ * might not happen often in practice, but in larger network topologies, a UDP
+ * packet can be received out of sequence.
+ * 2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
+ * aware of it. Again, this may not be a concern in practice on small local networks.
+ * For more information, see http://www.cafeaulait.org/course/week12/35.html
+ *
+ * MIT License:
+ * Copyright (c) 2008 Bjoern Hartmann
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * bjoern@cs.stanford.edu 12/30/2008
+ */
+
+#ifndef _WIFIUDP_H_
+#define _WIFIUDP_H_
+
+#include <Arduino.h>
+#include <Udp.h>
+#include <cbuf.h>
+
+class WiFiUDP : public UDP {
+private:
+  int udp_server;
+  IPAddress multicast_ip;
+  IPAddress remote_ip;
+  uint16_t server_port;
+  uint16_t remote_port;
+  char * tx_buffer;
+  size_t tx_buffer_len;
+  cbuf * rx_buffer;
+public:
+  WiFiUDP();
+  ~WiFiUDP();
+  uint8_t begin(IPAddress a, uint16_t p);
+  uint8_t begin(uint16_t p);
+  uint8_t beginMulticast(IPAddress a, uint16_t p);
+  void stop();
+  int beginMulticastPacket();
+  int beginPacket();
+  int beginPacket(IPAddress ip, uint16_t port);
+  int beginPacket(const char *host, uint16_t port);
+  int endPacket();
+  size_t write(uint8_t);
+  size_t write(const uint8_t *buffer, size_t size);
+  int parsePacket();
+  int available();
+  int read();
+  int read(unsigned char* buffer, size_t len);
+  int read(char* buffer, size_t len);
+  int peek();
+  void flush();
+  IPAddress remoteIP();
+  uint16_t remotePort();
+};
+
+#endif /* _WIFIUDP_H_ */
diff --git a/tools/sdk/bin/bootloader.bin b/tools/sdk/bin/bootloader.bin
index 52ceab2a..570b509c 100644
Binary files a/tools/sdk/bin/bootloader.bin and b/tools/sdk/bin/bootloader.bin differ
diff --git a/tools/sdk/include/config/sdkconfig.h b/tools/sdk/include/config/sdkconfig.h
index 9efcf153..810babc7 100644
--- a/tools/sdk/include/config/sdkconfig.h
+++ b/tools/sdk/include/config/sdkconfig.h
@@ -13,6 +13,7 @@
 #define CONFIG_NEWLIB_STDOUT_ADDCR 1
 #define CONFIG_ESPTOOLPY_FLASHSIZE "4MB"
 #define CONFIG_ETHERNET 1
+#define CONFIG_EMAC_L2_TO_L3_RX_BUF_MODE 1
 #define CONFIG_ARDUHAL_LOG_DEFAULT_LEVEL 1
 #define CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS 1
 #define CONFIG_BT_RESERVE_DRAM 0x10000
@@ -20,6 +21,7 @@
 #define CONFIG_CONSOLE_UART_BAUDRATE 115200
 #define CONFIG_LWIP_MAX_SOCKETS 4
 #define CONFIG_ESP32_ENABLE_STACK_BT 1
+#define CONFIG_EMAC_TASK_PRIORITY 20
 #define CONFIG_ULP_COPROC_RESERVE_MEM 512
 #define CONFIG_ESPTOOLPY_BAUD 921600
 #define CONFIG_TOOLPREFIX "xtensa-esp32-elf-"
diff --git a/tools/sdk/include/driver/driver/gpio.h b/tools/sdk/include/driver/driver/gpio.h
index fba013fe..1472ba83 100644
--- a/tools/sdk/include/driver/driver/gpio.h
+++ b/tools/sdk/include/driver/driver/gpio.h
@@ -156,6 +156,7 @@ typedef enum {
     GPIO_NUM_37 = 37,   /*!< GPIO37, input mode only */
     GPIO_NUM_38 = 38,   /*!< GPIO38, input mode only */
     GPIO_NUM_39 = 39,   /*!< GPIO39, input mode only */
+    GPIO_NUM_MAX = 40,
 } gpio_num_t;
 
 typedef enum {
@@ -205,9 +206,8 @@ typedef enum {
 } gpio_pull_mode_t;
 
 
-
+typedef void (*gpio_isr_t)(void*);
 typedef intr_handle_t gpio_isr_handle_t;
-typedef void (*gpio_event_callback)(gpio_num_t gpio_intr_num);
 
 /**
  * @brief GPIO common configuration
@@ -269,7 +269,7 @@ esp_err_t gpio_intr_disable(gpio_num_t gpio_num);
  *
  * @return
  *     - ESP_OK Success
- *     - GPIO_IS_VALID_GPIO GPIO number error
+ *     - ESP_ERR_INVALID_ARG GPIO number error
  *
  */
 esp_err_t gpio_set_level(gpio_num_t gpio_num, uint32_t level);
@@ -343,9 +343,6 @@ esp_err_t gpio_wakeup_disable(gpio_num_t gpio_num);
 /**
  * @brief   register GPIO interrupt handler, the handler is an ISR.
  *          The handler will be attached to the same CPU core that this function is running on.
- *          @note
- *          Users should know that which CPU is running and then pick a INUM that is not used by system.
- *          We can find the information of INUM and interrupt level in soc.h.
  *
  * @param  fn  Interrupt handler function.
  * @param  intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
@@ -360,8 +357,6 @@ esp_err_t gpio_wakeup_disable(gpio_num_t gpio_num);
  */
 esp_err_t gpio_isr_register(void (*fn)(void*), void * arg, int intr_alloc_flags, gpio_isr_handle_t *handle);
 
-
-
 /**
   * @brief Enable pull-up on GPIO.
   *
@@ -406,97 +401,55 @@ esp_err_t gpio_pulldown_en(gpio_num_t gpio_num);
   */
 esp_err_t gpio_pulldown_dis(gpio_num_t gpio_num);
 
+/**
+  * @brief Install a GPIO ISR service, so we can assign different ISR handler for different pins
+  *
+  * @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
+  *            ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
+  *
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_FAIL Operation fail
+  *     - ESP_ERR_NO_MEM No memory to install this service
+  */
+esp_err_t gpio_install_isr_service(int intr_alloc_flags);
 
 /**
- * ***************        ATTENTION       ********************/
-/**
- *@attention
- *     Each GPIO has its own separate configuration register, so we do not use
- *     a lock to serialize access to them. This works under the assumption that
- *     no situation will occur where two tasks try to configure the same GPIO
- *     pin simultaneously. It is up to the application developer to guarantee this.
- */
+  * @brief Un-install GPIO ISR service, free the resources.
+  */
+void gpio_uninstall_isr_service();
 
 /**
- *----------EXAMPLE TO CONFIGURE GPIO AS OUTPUT ------------ *
- * @code{c}
- *     gpio_config_t io_conf;
- *     io_conf.intr_type = GPIO_INTR_DISABLE;             //disable interrupt
- *     io_conf.mode = GPIO_MODE_OUTPUT;                       //set as output mode
- *     io_conf.pin_bit_mask = GPIO_SEL_18 | GPIO_SEL_19;      //bit mask of the pins that you want to set,e.g.GPIO18/19
- *     io_conf.pull_down_en = 0;                              //disable pull-down mode
- *     io_conf.pull_up_en = 0;                                //disable pull-up mode
- *     gpio_config(&io_conf);                                 //configure GPIO with the given settings
- * @endcode
- **/
+  * @brief Add ISR handler for the corresponding GPIO.
+  *
+  *        Interrupt handlers no longer need to be declared with IRAM_ATTR, unless you pass the ESP_INTR_FLAG_IRAM flag
+  *        when allocating the ISR in gpio_install_isr_service().
+  *        This ISR handler will be called from an ISR. So there probably is some stack size limit, and this limit
+  *        is smaller compared to a "raw" interrupt handler due to another level of indirection.
+  *
+  * @param gpio_num GPIO number
+  * @param isr_handler ISR handler function for the corresponding GPIO number.
+  * @param args parameter for ISR handler.
+  *
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_ERR_INVALID_STATE Wrong state, the ISR service has not been initialized.
+  *     - ESP_ERR_INVALID_ARG Parameter error
+  */
+esp_err_t gpio_isr_handler_add(gpio_num_t gpio_num, gpio_isr_t isr_handler, void* args);
 
 /**
- *----------EXAMPLE TO CONFIGURE GPIO AS OUTPUT ------------ *
- * @code{c}
- *     io_conf.intr_type = GPIO_INTR_POSEDGE;             //set posedge interrupt
- *     io_conf.mode = GPIO_MODE_INPUT;                        //set as input
- *     io_conf.pin_bit_mask = GPIO_SEL_4 | GPIO_SEL_5;        //bit mask of the pins that you want to set, e.g.,GPIO4/5
- *     io_conf.pull_down_en = 0;                              //disable pull-down mode
- *     io_conf.pull_up_en = 1;                                //enable pull-up mode
- *     gpio_config(&io_conf);                                 //configure GPIO with the given settings
- * @endcode
- */
-/**
- *----------EXAMPLE TO SET ISR HANDLER ----------------------
- * @code{c}
- * gpio_isr_register(gpio_intr_test,NULL, 0);    //hook the isr handler for GPIO interrupt
- * @endcode
- * @note
- *     1. user should arrange the INUMs that used, better not to use a same INUM for different interrupt.
- *     2. do not pick the INUM that already occupied by the system.
- *     3. refer to soc.h to check which INUMs that can be used.
- */
-/**
- *-------------EXAMPLE OF HANDLER FUNCTION-------------------*
- * @code{c}
- * #include "esp_attr.h"
- * void IRAM_ATTR gpio_intr_test(void* arg)
- * {
- *     //GPIO intr process
- *     ets_printf("in gpio_intr\n");
- *     uint32_t gpio_num = 0;
- *     uint32_t gpio_intr_status = READ_PERI_REG(GPIO_STATUS_REG);   //read status to get interrupt status for GPIO0-31
- *     uint32_t gpio_intr_status_h = READ_PERI_REG(GPIO_STATUS1_REG);//read status1 to get interrupt status for GPIO32-39
- *     SET_PERI_REG_MASK(GPIO_STATUS_W1TC_REG, gpio_intr_status);    //Clear intr for gpio0-gpio31
- *     SET_PERI_REG_MASK(GPIO_STATUS1_W1TC_REG, gpio_intr_status_h); //Clear intr for gpio32-39
- *     do {
- *         if(gpio_num < 32) {
- *             if(gpio_intr_status & BIT(gpio_num)) { //gpio0-gpio31
- *                 ets_printf("Intr GPIO%d ,val: %d\n",gpio_num,gpio_get_level(gpio_num));
- *                 //This is an isr handler, you should post an event to process it in RTOS queue.
- *             }
- *         } else {
- *             if(gpio_intr_status_h & BIT(gpio_num - 32)) {
- *                 ets_printf("Intr GPIO%d, val : %d\n",gpio_num,gpio_get_level(gpio_num));
- *                 //This is an isr handler, you should post an event to process it in RTOS queue.
- *             }
- *         }
- *     } while(++gpio_num < GPIO_PIN_COUNT);
- * }
- * @endcode
- */
+  * @brief Remove ISR handler for the corresponding GPIO.
+  *
+  * @param gpio_num GPIO number
+  *
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_ERR_INVALID_STATE Wrong state, the ISR service has not been initialized.
+  *     - ESP_ERR_INVALID_ARG Parameter error
+  */
+esp_err_t gpio_isr_handler_remove(gpio_num_t gpio_num);
 
-/**
- *----EXAMPLE OF I2C CONFIG AND PICK SIGNAL FOR IO MATRIX---*
- * @code{c}
- * gpio_config_t io_conf;
- * io_conf.intr_type = GPIO_INTR_DISABLE;                 //disable interrupt
- * io_conf.mode = GPIO_MODE_INPUT_OUTPUT_OD;              //set as output mode
- * io_conf.pin_bit_mask = GPIO_SEL_21 | GPIO_SEL_22;      //bit mask of the pins that you want to set,e.g.GPIO21/22
- * io_conf.pull_down_en = 0;                              //disable pull-down mode
- * io_conf.pull_up_en = 1;                                //enable pull-up mode
- * gpio_config(&io_conf);                                 //configure GPIO with the given settings
- * gpio_matrix_out(21, EXT_I2C_SCL_O_IDX, 0,  0);         //set output signal for io_matrix
- * gpio_matrix_out(22, EXT_I2C_SDA_O_IDX, 0,  0);         //set output signal for io_matrix
- * gpio_matrix_in( 22, EXT_I2C_SDA_I_IDX, 0);             //set input signal for io_matrix
- * @endcode
- *
- */
 
 #ifdef __cplusplus
 }
diff --git a/tools/sdk/include/driver/driver/ledc.h b/tools/sdk/include/driver/driver/ledc.h
index fb97c6c0..691379a3 100644
--- a/tools/sdk/include/driver/driver/ledc.h
+++ b/tools/sdk/include/driver/driver/ledc.h
@@ -253,7 +253,7 @@ int ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
  *     - ESP_OK Success
  *     - ESP_ERR_INVALID_ARG Parameter error
  */
-esp_err_t ledc_set_fade(ledc_mode_t speed_mode, uint32_t channel, uint32_t duty, ledc_duty_direction_t gradule_direction,
+esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, ledc_duty_direction_t gradule_direction,
                         uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale);
 
 /**
@@ -354,7 +354,7 @@ esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel);
  *     - ESP_OK Success
  *
  */
-esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint32_t timer_idx);
+esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t timer_idx);
 
 /***************************EXAMPLE**********************************
  *
@@ -391,7 +391,7 @@ esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint
  *
  * ----------------EXAMPLE OF SETTING DUTY --- -----------------
  * @code{c}
- * uint32_t ledc_channel = LEDC_CHANNEL_0;                  //LEDC channel(0-73)
+ * ledc_channel_t ledc_channel = LEDC_CHANNEL_0;            //LEDC channel(0-73)
  * uint32_t duty = 2000;                                    //duty range is 0 ~ ((2**bit_num)-1)
  * LEDC_set_duty(LEDC_HIGH_SPEED_MODE, ledc_channel, duty); //set speed mode, channel, and duty.
  * ledc_update_duty(LEDC_HIGH_SPEED_MODE, ledc_channel);    //after set duty, we need to call ledc_update_duty to update the settings.
diff --git a/tools/sdk/include/driver/driver/rmt.h b/tools/sdk/include/driver/driver/rmt.h
index 24df1ac8..36e33e73 100644
--- a/tools/sdk/include/driver/driver/rmt.h
+++ b/tools/sdk/include/driver/driver/rmt.h
@@ -524,7 +524,9 @@ esp_err_t rmt_set_err_intr_en(rmt_channel_t channel, bool en);
 esp_err_t rmt_set_tx_intr_en(rmt_channel_t channel, bool en);
 
 /**
- * @brief Set RMT TX event interrupt enable
+ * @brief Set RMT TX threshold event interrupt enable
+ *
+ * Causes an interrupt when a threshold number of items have been transmitted.
  *
  * @param channel RMT channel (0 - 7)
  *
@@ -536,7 +538,7 @@ esp_err_t rmt_set_tx_intr_en(rmt_channel_t channel, bool en);
  *     - ESP_ERR_INVALID_ARG Parameter error
  *     - ESP_OK Success
  */
-esp_err_t rmt_set_evt_intr_en(rmt_channel_t channel, bool en, uint16_t evt_thresh);
+esp_err_t rmt_set_tx_thr_intr_en(rmt_channel_t channel, bool en, uint16_t evt_thresh);
 
 /**
  * @brief Set RMT pins
diff --git a/tools/sdk/include/driver/driver/uart.h b/tools/sdk/include/driver/driver/uart.h
index 34ca9fc4..68d02a5e 100644
--- a/tools/sdk/include/driver/driver/uart.h
+++ b/tools/sdk/include/driver/driver/uart.h
@@ -23,6 +23,7 @@ extern "C" {
 #include "soc/uart_reg.h"
 #include "soc/uart_struct.h"
 #include "esp_err.h"
+#include "esp_intr_alloc.h"
 #include "driver/periph_ctrl.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
@@ -129,6 +130,7 @@ typedef enum {
     UART_PARITY_ERR,        /*!< UART RX parity event*/
     UART_DATA_BREAK,        /*!< UART TX data and break event*/
     UART_EVENT_MAX,         /*!< UART event max index*/
+    UART_PATTERN_DET,        /*!< UART pattern detected */
 } uart_event_type_t;
 
 /**
@@ -139,6 +141,8 @@ typedef struct {
     size_t size;            /*!< UART data size for UART_DATA event*/
 } uart_event_t;
 
+typedef intr_handle_t uart_isr_handle_t;
+
 /**
  * @brief Set UART data bits.
  *
@@ -372,12 +376,14 @@ esp_err_t uart_enable_tx_intr(uart_port_t uart_num, int enable, int thresh);
  * @param arg parameter for handler function
  * @param  intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
  *            ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info. 
+ * @param handle Pointer to return handle. If non-NULL, a handle for the interrupt will
+ *        be returned here.
  *
  * @return
  *     - ESP_OK   Success
  *     - ESP_FAIL Parameter error
  */
-esp_err_t uart_isr_register(uart_port_t uart_num, void (*fn)(void*), void * arg, int intr_alloc_flags);
+esp_err_t uart_isr_register(uart_port_t uart_num, void (*fn)(void*), void * arg, int intr_alloc_flags,  uart_isr_handle_t *handle);
 
 
 /**
@@ -467,11 +473,12 @@ esp_err_t uart_intr_config(uart_port_t uart_num, const uart_intr_config_t *intr_
  * We can find the information of INUM and interrupt level in soc.h.
  *
  * @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
- * @param rx_buffer_size UART RX ring buffer size
+ * @param rx_buffer_size UART RX ring buffer size, rx_buffer_size should be greater than UART_FIFO_LEN.
  * @param tx_buffer_size UART TX ring buffer size.
  *        If set to zero, driver will not use TX buffer, TX function will block task until all data have been sent out..
  * @param queue_size UART event queue size/depth.
- * @param uart_queue UART event queue handle, if set NULL, driver will not use an event queue.
+ * @param uart_queue UART event queue handle (out param). On success, a new queue handle is written here to provide
+ *        access to UART events. If set to NULL, driver will not use an event queue.
  * @param  intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
  *            ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
  *
@@ -479,7 +486,7 @@ esp_err_t uart_intr_config(uart_port_t uart_num, const uart_intr_config_t *intr_
  *     - ESP_OK   Success
  *     - ESP_FAIL Parameter error
  */
-esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_buffer_size, int queue_size, void* uart_queue, int intr_alloc_flags);
+esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_buffer_size, int queue_size, QueueHandle_t* uart_queue, int intr_alloc_flags);
 
 /**
  * @brief Uninstall UART driver.
@@ -588,6 +595,48 @@ int uart_read_bytes(uart_port_t uart_num, uint8_t* buf, uint32_t length, TickTyp
  */
 esp_err_t uart_flush(uart_port_t uart_num);
 
+/**
+ * @brief   UART get RX ring buffer cached data length
+ *
+ * @param   uart_num UART port number.
+ * @param   size Pointer of size_t to accept cached data length
+ *
+ * @return
+ *     - ESP_OK Success
+ *     - ESP_FAIL Parameter error
+ */
+esp_err_t uart_get_buffered_data_len(uart_port_t uart_num, size_t* size);
+
+/**
+ * @brief   UART disable pattern detect function.
+ *          Designed for applications like 'AT commands'.
+ *          When the hardware detect a series of one same character, the interrupt will be triggered.
+ *
+ * @param   uart_num UART port number.
+ *
+ * @return
+ *     - ESP_OK Success
+ *     - ESP_FAIL Parameter error
+ */
+esp_err_t uart_disable_pattern_det_intr(uart_port_t uart_num);
+
+/**
+ * @brief   UART enable pattern detect function.
+ *          Designed for applications like 'AT commands'.
+ *          When the hardware detect a series of one same character, the interrupt will be triggered.
+ *
+ * @param uart_num UART port number.
+ * @param pattern_chr character of the pattern
+ * @param chr_num number of the character, 8bit value.
+ * @param chr_tout timeout of the interval between each pattern characters, 24bit value, unit is APB(80Mhz) clock cycle.
+ * @param post_idle idle time after the last pattern character, 24bit value, unit is APB(80Mhz) clock cycle.
+ * @param pre_idle idle time before the first pattern character, 24bit value, unit is APB(80Mhz) clock cycle.
+ *
+ * @return
+ *     - ESP_OK Success
+ *     - ESP_FAIL Parameter error
+ */
+esp_err_t uart_enable_pattern_det_intr(uart_port_t uart_num, char pattern_chr, uint8_t chr_num, int chr_tout, int post_idle, int pre_idle);
 /***************************EXAMPLE**********************************
  *
  *
@@ -599,7 +648,7 @@ esp_err_t uart_flush(uart_port_t uart_num);
  * //a. Set UART parameter
  * int uart_num = 0;                                       //uart port number
  * uart_config_t uart_config = {
- *    .baud_rate = UART_BITRATE_115200,                    //baudrate
+ *    .baud_rate = 115200,                                 //baudrate
  *    .data_bits = UART_DATA_8_BITS,                       //data bit mode
  *    .parity = UART_PARITY_DISABLE,                       //parity mode
  *    .stop_bits = UART_STOP_BITS_1,                       //stop bit mode
@@ -658,7 +707,7 @@ esp_err_t uart_flush(uart_port_t uart_num);
  *     //Set UART1 pins(TX: IO16, RX: IO17, RTS: IO18, CTS: IO19)
  *     uart_set_pin(uart_num, 16, 17, 18, 19);
  *     //Install UART driver( We don't need an event queue here)
- *     uart_driver_install(uart_num, 1024 * 2, 1024*4, 10, 17, NULL, RINGBUF_TYPE_BYTEBUF);
+ *     uart_driver_install(uart_num, 1024 * 2, 1024*4, 0, NULL, 0);
  *     uint8_t data[1000];
  *     while(1) {
  *         //Read data from UART
@@ -692,7 +741,6 @@ esp_err_t uart_flush(uart_port_t uart_num);
  *                     ESP_LOGI(TAG,"data, len: %d", event.size);
  *                     int len = uart_read_bytes(uart_num, dtmp, event.size, 10);
  *                     ESP_LOGI(TAG, "uart read: %d", len);
-                       uart_write_bytes(uart_num, (const char*)dtmp, len);
  *                     break;
  *                 //Event of HW FIFO overflow detected
  *                 case UART_FIFO_OVF:
diff --git a/tools/sdk/include/esp32/esp_wifi.h b/tools/sdk/include/esp32/esp_wifi.h
index 68d06aae..ac49764f 100755
--- a/tools/sdk/include/esp32/esp_wifi.h
+++ b/tools/sdk/include/esp32/esp_wifi.h
@@ -107,17 +107,15 @@ typedef struct {
   *         WiFi NVS structure etc, this WiFi also start WiFi task
   *
   * @attention 1. This API must be called before all other WiFi API can be called
-  * @attention 2. Generally we should init event_q in *config, WiFi driver will post the event
-  *               to this queue when event happens, such as, when station connects to WiFi, WiFi driver
-  *               will post station connected event to this queue. If the queue is not initialized, WiFi
-  *               will not post any events
+  * @attention 2. event_handler field in cfg should be set to a valid event handler function.
+  *            In most cases, use the WIFI_INIT_CONFIG_DEFAULT macro which sets esp_event_send().
   *
   * @param  config provide WiFi init configuration
   *
   * @return
   *    - ESP_OK: succeed
   *    - ESP_ERR_WIFI_NO_MEM: out of memory
-  *    - others: refer to error code esp_err.h 
+  *    - others: refer to error code esp_err.h
   */
 esp_err_t esp_wifi_init(wifi_init_config_t *config);
 
diff --git a/tools/sdk/include/esp32/esp_wifi_types.h b/tools/sdk/include/esp32/esp_wifi_types.h
index 583d7a6a..ac764282 100755
--- a/tools/sdk/include/esp32/esp_wifi_types.h
+++ b/tools/sdk/include/esp32/esp_wifi_types.h
@@ -96,7 +96,7 @@ typedef enum {
 } wifi_second_chan_t;
 
 typedef struct {
-    char *ssid;          /**< SSID of AP */
+    uint8_t *ssid;       /**< SSID of AP */
     uint8_t *bssid;      /**< MAC address of AP */
     uint8_t channel;     /**< channel, scan the specific channel */
     bool show_hidden;    /**< enable to scan AP whose SSID is hidden */
@@ -126,8 +126,8 @@ typedef enum {
 } wifi_bandwidth_t;
 
 typedef struct {
-    char ssid[32];              /**< SSID of ESP32 soft-AP */
-    char password[64];          /**< Password of ESP32 soft-AP */
+    uint8_t ssid[32];           /**< SSID of ESP32 soft-AP */
+    uint8_t password[64];       /**< Password of ESP32 soft-AP */
     uint8_t ssid_len;           /**< Length of SSID. If softap_config.ssid_len==0, check the SSID until there is a termination character; otherwise, set the SSID length according to softap_config.ssid_len. */
     uint8_t channel;            /**< Channel of ESP32 soft-AP */
     wifi_auth_mode_t authmode;  /**< Auth mode of ESP32 soft-AP. Do not support AUTH_WEP in soft-AP mode */
@@ -137,8 +137,8 @@ typedef struct {
 } wifi_ap_config_t;
 
 typedef struct {
-    char ssid[32];         /**< SSID of target AP*/
-    char password[64];     /**< password of target AP*/
+    uint8_t ssid[32];      /**< SSID of target AP*/
+    uint8_t password[64];  /**< password of target AP*/
     bool bssid_set;        /**< whether set MAC address of target AP or not. Generally, station_config.bssid_set needs to be 0; and it needs to be 1 only when users need to check the MAC address of the AP.*/
     uint8_t bssid[6];     /**< MAC address of target AP*/
 } wifi_sta_config_t;
@@ -215,7 +215,7 @@ typedef struct {
 
 typedef struct {
     wifi_pkt_rx_ctrl_t rx_ctrl;
-    char payload[0];           /**< ieee80211 packet buff, The length of payload is described by sig_len */
+    uint8_t payload[0];       /**< ieee80211 packet buff, The length of payload is described by sig_len */
 } wifi_promiscuous_pkt_t;
 
 /**
diff --git a/tools/sdk/include/esp32/soc/cpu.h b/tools/sdk/include/esp32/soc/cpu.h
index 4457c81a..aa471a17 100644
--- a/tools/sdk/include/esp32/soc/cpu.h
+++ b/tools/sdk/include/esp32/soc/cpu.h
@@ -26,6 +26,16 @@
 #define WSR(reg, newval)  asm volatile ("wsr %0, " #reg : : "r" (newval));
 #define XSR(reg, swapval) asm volatile ("xsr %0, " #reg : "+r" (swapval));
 
+/** @brief Read current stack pointer address
+ *
+ */
+static inline void *get_sp()
+{
+    void *sp;
+    asm volatile ("mov %0, sp;" : "=r" (sp));
+    return sp;
+}
+
 /* Return true if the CPU is in an interrupt context
    (PS.UM == 0)
 */
diff --git a/tools/sdk/include/ethernet/esp_eth.h b/tools/sdk/include/ethernet/esp_eth.h
index b97289dd..2aae9d20 100644
--- a/tools/sdk/include/ethernet/esp_eth.h
+++ b/tools/sdk/include/ethernet/esp_eth.h
@@ -22,15 +22,21 @@
 extern "C" {
 #endif
 
-typedef void (*eth_phy_fun)(void);
-typedef esp_err_t (*eth_tcpip_input_fun)(void *buffer, uint16_t len, void *eb);
-typedef void (*eth_gpio_config_func)(void);
-
 typedef enum {
     ETH_MODE_RMII = 0,
     ETH_MDOE_MII,
 } eth_mode_t;
 
+typedef enum {
+    ETH_SPEED_MODE_10M = 0,
+    ETH_SPEED_MODE_100M,
+} eth_speed_mode_t;
+
+typedef enum {
+    ETH_MODE_HALFDUPLEX = 0,
+    ETH_MDOE_FULLDUPLEX,
+} eth_duplex_mode_t;
+
 typedef enum {
     PHY0 = 0,
     PHY1,
@@ -66,6 +72,15 @@ typedef enum {
     PHY31,
 } eth_phy_base_t;
 
+typedef bool (*eth_phy_check_link_func)(void);
+typedef void (*eth_phy_check_init_func)(void);
+typedef eth_speed_mode_t (*eth_phy_get_speed_mode_func)(void);
+typedef eth_duplex_mode_t (*eth_phy_get_duplex_mode_func)(void);
+typedef void (*eth_phy_func)(void);
+typedef esp_err_t (*eth_tcpip_input_func)(void *buffer, uint16_t len, void *eb);
+typedef void (*eth_gpio_config_func)(void);
+
+
 /**
  * @brief ethernet configuration
  *
@@ -73,8 +88,12 @@ typedef enum {
 typedef struct {
     eth_phy_base_t  phy_addr;                   /*!< phy base addr (0~31) */
     eth_mode_t mac_mode;                        /*!< mac mode only support RMII now */
-    eth_tcpip_input_fun tcpip_input;            /*!< tcpip input func  */
-    eth_phy_fun phy_init;                       /*!< phy init func  */
+    eth_tcpip_input_func tcpip_input;            /*!< tcpip input func  */
+    eth_phy_func phy_init;                       /*!< phy init func  */
+    eth_phy_check_link_func phy_check_link;     /*!< phy check link func  */
+    eth_phy_check_init_func phy_check_init;     /*!< phy check init func  */
+    eth_phy_get_speed_mode_func phy_get_speed_mode;     /*!< phy check init func  */
+    eth_phy_get_duplex_mode_func phy_get_duplex_mode;     /*!< phy check init func  */
     eth_gpio_config_func gpio_config;           /*!< gpio config func  */
 } eth_config_t;
 
@@ -159,6 +178,16 @@ void esp_eth_smi_write(uint32_t reg_num, uint16_t value);
  */
 uint16_t esp_eth_smi_read(uint32_t reg_num);
 
+/**
+ * @brief  Free emac rx buf.
+ *
+ * @note  buf can not be null,and it is tcpip input buf.
+ *
+ * @param[in] buf: start address of recevie packet data.
+ *
+ */
+void esp_eth_free_rx_buf(void *buf);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/tools/sdk/include/freertos/freertos/heap_regions_debug.h b/tools/sdk/include/freertos/freertos/heap_regions_debug.h
index 6ab4681f..dca9531d 100644
--- a/tools/sdk/include/freertos/freertos/heap_regions_debug.h
+++ b/tools/sdk/include/freertos/freertos/heap_regions_debug.h
@@ -22,9 +22,10 @@ typedef struct {
 
 /* Please keep this definition same as BlockLink_t */
 typedef struct _os_block_t {
-    struct _os_block_t *next;
-    size_t   size;
-    unsigned int xtag;
+    struct _os_block_t *next;               /*<< The next free block in the list. */
+    int size: 24;                           /*<< The size of the free block. */
+    int xtag: 7;                            /*<< Tag of this region */
+    int xAllocated: 1;                      /*<< 1 if allocated */
 }os_block_t;
 
 typedef struct {
@@ -50,7 +51,7 @@ typedef struct _mem_dbg_ctl{
 #define OS_BLOCK(_b)   ((os_block_t*)((debug_block_t*)((char*)(_b) + BLOCK_HEAD_LEN)))
 #define DEBUG_BLOCK(_b)  ((debug_block_t*)((char*)(_b) - BLOCK_HEAD_LEN))
 #define HEAD_DOG(_b) ((_b)->head.dog)
-#define TAIL_DOG(_b) (*(unsigned int*)((char*)(_b) + (((_b)->os_block.size & (~g_alloc_bit) ) - BLOCK_TAIL_LEN)))
+#define TAIL_DOG(_b) (*(unsigned int*)((char*)(_b) + (((_b)->os_block.size ) - BLOCK_TAIL_LEN)))
 
 #define DOG_ASSERT()\
 {\
diff --git a/tools/sdk/include/freertos/freertos/portmacro.h b/tools/sdk/include/freertos/freertos/portmacro.h
index f20a4a1e..7cae4b05 100644
--- a/tools/sdk/include/freertos/freertos/portmacro.h
+++ b/tools/sdk/include/freertos/freertos/portmacro.h
@@ -213,7 +213,6 @@ portBASE_TYPE vPortCPUReleaseMutex(portMUX_TYPE *mux);
 #define portEXIT_CRITICAL_ISR(mux)    vPortCPUReleaseMutex(mux)
 #endif
 
-
 // Cleaner and preferred solution allows nested interrupts disabling and restoring via local registers or stack.
 // They can be called from interrupts too.
 //NOT SMP-COMPATIBLE! Use only if all you want is to disable the interrupts locally!
diff --git a/tools/sdk/include/lwip/lwip/pbuf.h b/tools/sdk/include/lwip/lwip/pbuf.h
index 1834c4e0..d84aabaf 100755
--- a/tools/sdk/include/lwip/lwip/pbuf.h
+++ b/tools/sdk/include/lwip/lwip/pbuf.h
@@ -105,6 +105,12 @@ typedef enum {
 /** indicates this pbuf includes a TCP FIN flag */
 #define PBUF_FLAG_TCP_FIN   0x20U
 
+#if ESP_LWIP
+#define PBUF_USER_FLAG_OWNER_NULL   0
+#define PBUF_USER_FLAG_OWNER_WIFI   1
+#define PBUF_USER_FLAG_OWNER_ETH    2
+#endif
+
 struct pbuf {
   /** next pbuf in singly linked pbuf chain */
   struct pbuf *next;
@@ -138,7 +144,8 @@ struct pbuf {
   u16_t ref;
   
 #if ESP_LWIP
-  void  *eb;
+  void  *user_buf;
+  u8_t user_flag;
 #endif
 };
 
diff --git a/tools/sdk/include/lwip/lwipopts.h b/tools/sdk/include/lwip/lwipopts.h
index 76f94ba6..9c2dee35 100755
--- a/tools/sdk/include/lwip/lwipopts.h
+++ b/tools/sdk/include/lwip/lwipopts.h
@@ -154,14 +154,14 @@
  * this option does not affect outgoing packet sizes, which can be controlled
  * via IP_FRAG.
  */
-#define IP_REASSEMBLY                   0
+#define IP_REASSEMBLY                   CONFIG_LWIP_IP_REASSEMBLY
 
 /**
  * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
  * that this option does not affect incoming packet sizes, which can be
  * controlled via IP_REASSEMBLY.
  */
-#define IP_FRAG                         0
+#define IP_FRAG                         CONFIG_LWIP_IP_FRAG
 
 /**
  * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
diff --git a/tools/sdk/include/lwip/port/lwipopts.h b/tools/sdk/include/lwip/port/lwipopts.h
index 76f94ba6..9c2dee35 100755
--- a/tools/sdk/include/lwip/port/lwipopts.h
+++ b/tools/sdk/include/lwip/port/lwipopts.h
@@ -154,14 +154,14 @@
  * this option does not affect outgoing packet sizes, which can be controlled
  * via IP_FRAG.
  */
-#define IP_REASSEMBLY                   0
+#define IP_REASSEMBLY                   CONFIG_LWIP_IP_REASSEMBLY
 
 /**
  * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
  * that this option does not affect incoming packet sizes, which can be
  * controlled via IP_REASSEMBLY.
  */
-#define IP_FRAG                         0
+#define IP_FRAG                         CONFIG_LWIP_IP_FRAG
 
 /**
  * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
diff --git a/tools/sdk/include/spi_flash/esp_spi_flash.h b/tools/sdk/include/spi_flash/esp_spi_flash.h
index 91675088..bb3ec39b 100644
--- a/tools/sdk/include/spi_flash/esp_spi_flash.h
+++ b/tools/sdk/include/spi_flash/esp_spi_flash.h
@@ -78,13 +78,13 @@ esp_err_t spi_flash_erase_range(size_t start_address, size_t size);
  * @note If source address is in DROM, this function will return
  *       ESP_ERR_INVALID_ARG.
  *
- * @param  dest  destination address in Flash. Must be a multiple of 4 bytes.
- * @param  src   pointer to the source buffer.
- * @param  size  length of data, in bytes. Must be a multiple of 4 bytes.
+ * @param  dest_addr destination address in Flash. Must be a multiple of 4 bytes.
+ * @param  src       pointer to the source buffer.
+ * @param  size      length of data, in bytes. Must be a multiple of 4 bytes.
  *
  * @return esp_err_t
  */
-esp_err_t spi_flash_write(size_t dest, const void *src, size_t size);
+esp_err_t spi_flash_write(size_t dest_addr, const void *src, size_t size);
 
 
 /**
@@ -97,24 +97,24 @@ esp_err_t spi_flash_write(size_t dest, const void *src, size_t size);
  * @note If source address is in DROM, this function will return
  *       ESP_ERR_INVALID_ARG.
  *
- * @param  dest  destination address in Flash. Must be a multiple of 32 bytes.
- * @param  src   pointer to the source buffer.
- * @param  size  length of data, in bytes. Must be a multiple of 32 bytes.
+ * @param  dest_addr destination address in Flash. Must be a multiple of 32 bytes.
+ * @param  src       pointer to the source buffer.
+ * @param  size      length of data, in bytes. Must be a multiple of 32 bytes.
  *
  * @return esp_err_t
  */
-esp_err_t spi_flash_write_encrypted(size_t dest, const void *src, size_t size);
+esp_err_t spi_flash_write_encrypted(size_t dest_addr, const void *src, size_t size);
 
 /**
  * @brief  Read data from Flash.
  *
- * @param  src   source address of the data in Flash.
- * @param  dest  pointer to the destination buffer
- * @param  size  length of data
+ * @param  src_addr source address of the data in Flash.
+ * @param  dest     pointer to the destination buffer
+ * @param  size     length of data
  *
  * @return esp_err_t
  */
-esp_err_t spi_flash_read(size_t src, void *dest, size_t size);
+esp_err_t spi_flash_read(size_t src_addr, void *dest, size_t size);
 
 /**
  * @brief Enumeration which specifies memory space requested in an mmap call
@@ -149,7 +149,7 @@ typedef uint32_t spi_flash_mmap_handle_t;
  *
  * @return  ESP_OK on success, ESP_ERR_NO_MEM if pages can not be allocated
  */
-esp_err_t spi_flash_mmap(uint32_t src_addr, size_t size, spi_flash_mmap_memory_t memory,
+esp_err_t spi_flash_mmap(size_t src_addr, size_t size, spi_flash_mmap_memory_t memory,
                          const void** out_ptr, spi_flash_mmap_handle_t* out_handle);
 
 /**
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